How do you find out your new Giffgaff phone number

Hi, sorry if this is a stupid question but i've registered and activated my sim tonight and i believe it won't be activated until the morning but is there anyway of finding out what my new phone number will be before the morning? Thanks.

Re: How do you find out your new Giffgaff phone number

Thanks for the replies. I have topped up and it's not showing on the My Giffgaff 'dashboard' yet so it does make sense that it will appear when the activation has gone through. How exciting! Thanks again all, very helpful.